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Publication numberCN102211054 A
Publication typeApplication
Application numberCN 201110141345
Publication date12 Oct 2011
Filing date30 May 2011
Priority date30 May 2011
Also published asCN102211054B
Publication number201110141345.5, CN 102211054 A, CN 102211054A, CN 201110141345, CN-A-102211054, CN102211054 A, CN102211054A, CN201110141345, CN201110141345.5
Inventors冉进财, 刘炯天, 李延锋, 陈文刊
Applicant中国矿业大学
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Process for sorting coarse coal slime by utilizing heavy medium liquid-solid fluidized bed
CN 102211054 A
Abstract
The invention provides a process for sorting coarse coal slime by utilizing a heavy medium liquid-solid fluidized bed. The process provided by the invention comprises the following steps: pouring a dilute medium of screenings screened by a clean coal medium-removing and dewatering screen and a part of the medium in a current divider box into a coarse coal slime sorting feed barrel; introducing a medium in a heavy medium system into the feedings of a liquid-solid fluidized bed coarse coal slime sorter; after the feedings are sorted by the liquid-solid fluidized bed coarse coal slime sorter, adding a magnetic separator recovery medium into overflows and underflows, wherein the added heavy medium can be used for weakening the influence of granularity to interference settlement, and strengthening the effect for sorting materials according to density, so that the sorting precision of the liquid-solid fluidized bed coarse coal slime sorter within a wide grain range can be improved, and the recovery ratio of coarse clean coals is greatly improved on the premise of ensuring the ash content of the coarse clean coals; simultaneously, the grain processing range of the liquid-solid fluidized bed coarse coal slime sorter is expanded; and the processing capacity of reselection is improved, and the flotation cost is reduced.
Claims(1)  translated from Chinese
1. 一种重介质液固流化床粗煤泥分选工艺,包括对原煤(1)进行脱泥或不脱泥,脱泥后原煤或不脱泥的原煤和介质桶(22)中的介质一并进入三产品重介旋流器(3)中进行分选,分选出的精煤、中煤和矸石分别进行脱介脱水,其中精煤进入精煤弧形筛(进行预先脱介,预先脱介后的筛上混合物进入精煤脱介脱水筛(7)脱介脱水,筛下物介质进入分流箱(8)中分流,精煤脱介脱水筛(7)筛上物的精煤进入精煤脱水设备(9)脱水后排出,精煤脱介脱水筛(7)筛下物的合格介质和分流箱(8)中的一部分介质I 一并进入合介桶(22);其特征在于:所述的精煤脱介脱水筛(7)筛下物的稀介质和分流箱(8)中的另一部分介质II 一并进入粗煤泥分选入料桶(10);粗煤泥分选入料桶(10)的煤介混合物进入分级旋流器(11)中进行分级;经分级旋流器(11)分级出的溢流细颗物料进入磁选机(1磁选,磁选机(1磁选后的精矿进入合介桶(22),磁选后的尾矿进入浮选设备(21)浮选;经分级旋流器(11)分级出的底流粗颗物料进入液固流化床粗煤泥分选机(12)分选, 液固流化床粗煤泥分选机(12)分选出的溢流进入精煤磁选机(14)磁选,磁选精矿进入合介桶(22),磁选尾矿经精煤煤泥分级脱水设备(17)脱水,脱水后的精煤排出,精煤煤泥水进入浮选设备(21)浮选;液固流化床粗煤泥分选机(12)分选出的底流进入中煤磁选机(13)磁选,磁选精矿进入合介桶(22),磁选尾矿经中煤煤泥分级脱水设备(16)脱水,脱水后的中煤排出,中煤煤泥水进入浓缩压滤(19)设备进行浓缩压滤。 A heavy medium liquid-solid fluidized bed of coarse slime separation process, including raw coal (1) does not go off the mud or mud, mud off after the captive coal or coal mud and medium barrel (22) media together into the three product dense medium cyclone (3) sorting, sorted the coal, coal and waste rock were sculping dehydration, including coal into the coal curved screen ( pre-removal medium, medium sieve off after a pre-mixture into the coal sculping dewatering screen (7) sculping dehydrated sieve material medium to shunt tank (8) shunt sculping coal dewatering screen (7) on the screen material coal into the coal dewatering equipment (9) is discharged after dewatering, coal sculping dewatering screen (7) under the screen qualified media and shunt box (8) into the closed part of the media I be mediated barrel (22); wherein: said sculping coal dewatering screen (7) sieve was diluted medium and split box (8) in another part of the medium II be entered into the Slime Separation Tank (10); crude Slime Separation into the barrel (10) into the classification of a mixture of coal medium cyclone (11) grading; graded cyclone (11) grade material fine particles out of the overflow into the separator (1 Magnetic , magnetic separator (1 magnetic concentrate after entering the co-mediated barrel (22), after entering the flotation tailings magnetic separation equipment (21) flotation; graded cyclone (11) Classification of coarse particles underflow material into the liquid-solid fluidized bed of coarse slime separator (12) sorting, liquid-solid fluidized bed of coarse slime separator (12) The sorted overflow into the coal magnetic separator (14) separator , magnetic concentrate into the closed-mediated barrel (22) by magnetic separation tailings grade coal slime dewatering equipment (17) dehydration, dehydration after discharge coal, coal slime water into the flotation device (21) flotation ; liquid-solid fluidized bed of coarse slime separator (12) flows into the bottom of sorted coal magnetic separator (13), magnetic separation, magnetic separation concentrate into the closed-mediated barrel (22), magnetic separation tailings neutralized grade coal slime dewatering equipment (16) dehydration, after the coal is discharged to the enrichment of coal slime water filter press (19) equipment concentrated pressure filtration.
Description  translated from Chinese

重介质液固流化床分选粗煤泥工艺 Heavy media separation liquid-solid fluidized bed of coarse slime process

技术领域 Technical Field

[0001] 本发明涉及一种重介质液固流化床分选粗煤泥工艺,尤其适用于煤炭湿法分选工艺中的3-0. 25mm粗煤泥的降灰脱硫。 [0001] The present invention relates to a heavy media separation liquid-solid fluidized bed of coarse slime process, especially for the wet coal separation process in the 3-0. 25mm thick slime of ash and sulfur reduction.

背景技术 Background

[0002] 目前大多数选煤工艺采用不分级重选+粗煤泥分选+浮选相结合的工艺,粗煤泥根据国标GB/T7186-1998 —般指2mm_0. 25mm的煤粒,位于重选和浮选分选粒度界限(一般为0. 5mm)的附近,这部分煤泥一般采用煤泥重介旋流器、螺旋分选机和液固流化床粗煤泥分选机分选,采用煤泥重介旋流器分选粗煤泥时,受大直径旋流器的工作状况影响大,分选效果差,并且设备入料压力大,设备磨损严重。 [0002] Most coal cleaning process uses ungraded reselection + Slime Separation + flotation combination of technology, according to the national standard for coarse slime GB / T7186-1998 - generally refers 2mm_0 25mm of coal particles located heavy. election and flotation separation size limits (usually 0. 5mm) in the vicinity, this part of the general slime slime heavy medium cyclone, spiral separator and liquid-solid fluidized bed of coarse slime sorting machine sorting using Slime Dense Medium Cyclone election coarse slime by large diameter cyclone big influence working conditions, poor sorting and feeding pressure equipment, equipment wear serious. 螺旋分选机分选粗煤泥时,分选密度高并且不可调,分选出精煤灰分高。 Spiral sorting machine sorting coarse slime, the separation of high density and is not adjustable, sorted coal ash high. 液固流化床粗煤泥分选机依靠分选密度低并且可以控制调节, 对入料浓度要求一般不严格,动力消耗小的优势成为目前能够有效分选粗煤泥的设备之 Liquid-solid fluidized bed of coarse slime sorting machine sorting rely on low density and can control the adjustment of the feed concentration requirements are generally less stringent, small power consumption advantages become effective separation of coarse slime equipment

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[0003] 液固流化床粗煤泥分选机是一种利用上升水流使煤泥流态化,依托煤泥自身作为介质形成具有一定密度的床层,煤泥按照一定的干扰沉降速度实现分选。 [0003] The liquid-solid fluidized bed of coarse slime sorting machine is a fluidized use rose water to make slime, slime relying on itself as the medium is formed with a certain density of the bed, according to some interference slime settling velocity to achieve Sorting. 干扰沉降速度与颗粒的粒度、密度性质有关,当窄粒级分选时,干扰沉降速度受粒度影响较小,床层密度稳定,物料按密度实现分选,分选精度高。 Interference settling velocity and particle size, density nature, when a narrow grain size sorting, settling velocity is less interference effect size, the bed density is stable, according to the density of the material to achieve separation, sorting and high accuracy. 当宽粒级分选时,干扰沉降速度受粒度影响大,床层密度不稳定,物料不能严格按照密度分选,分选精度降低。 When wide grain size sorting, interference by sedimentation velocity particle impact, unstable bed density, the material can not be strictly in accordance with the density separation, sorting precision. 生产实际中的一般液固流化流床粗煤分选工艺是重介分选工艺中的精煤磁选尾矿或与脱泥筛筛下物经过分级旋流器分级后进入液固流化床粗煤泥分选机,在该工艺中,分选机的分选上限是由重选工艺中的脱介筛和脱泥筛的筛孔决定的,分选下限是由分级旋流器决定的,由于分级旋流器的分级效率低,决定了该工艺的分选粒度范围比较宽。 The actual production of the general flow of liquid-solid fluidized bed coal cleaning process is a coarse heavy medium separation process of coal magnetic separation tailings or under Desliming sieve was subjected after the cyclone classifier classifier into the liquid-solid fluidized Bed coarse slime sorting machine, in the process, sorting machine sorting ceiling is made of re-election process sculping sieve sieve sieve and off the mud decision, sorting limit is determined by classifying cyclone due to low-grade cyclone fractional efficiency, determine the size range of the sorting process is wide. 在宽粒级分选过程中,高密度细颗粒会进入溢流污染精煤,低密度粗颗粒会进入底流成为尾煤,造成精煤回收率低,精煤灰分高,分选精度低,分选效果差,同时,由于液固流化床分选机在宽粒级分选效果差,导致重选的处理量受到限制,浮选的成本大。 Wide grain size sorting process, high density fine particles into the overflow pollution coal, low-density coarse particles flow into the bottom end became coal, causing coal recovery is low, the high ash content, sorting accuracy is low, sub selected poor, and because the liquid-solid fluidized separator in a wide grain size separation is poor, resulting in the re-election of the processing capacity is limited, a large flotation costs.

[0004] 技术内容 [0004] The technical content

技术问题:本发明的目的是克服已有技术中的不足之处,提供一种在分选3mm-0. 25mm 的粗煤泥时,精煤灰分低,分选精度高,分选效果好的重介质液固流化床分选粗煤泥工艺。 Technical issues: The purpose of the present invention is to overcome the disadvantages of the prior art, to provide a sorting 3mm-0 when 25mm thick slime, coal, low ash, high precision sorting, sorting good effect. Heavy media separation liquid-solid fluidized bed of coarse slime processes.

[0005] 技术方案:本发明的重介质液固流化床分选粗煤泥工艺:包括对原煤进行脱泥或不脱泥,脱泥后原煤或不脱泥的原煤和介质桶中的介质进入三产品重介旋流器中进行分选,分选出的精煤、中煤和矸石分别进行脱介脱水,其中精煤进入精煤弧形筛进行预先脱介,预先脱介后的筛上混合物进入精煤脱介脱水筛脱介脱水,筛下物介质进入分流箱中分流,精煤脱介脱水筛筛上物的精煤进入精煤脱水设备脱水后排出,精煤脱介脱水筛筛下物的合格介质和分流箱中的一部分介质I一并进入合介桶; [0005] The technical solutions: heavy medium liquid-solid fluidized bed of the present invention, coarse slime separation process: including raw coal off the mud or mud off after the mud off of coal or coal is not off the mud bucket and media in the media into the three product dense medium cyclone sorting, sorted the coal, coal and waste rock were sculping dehydration, including coal into the coal pre-curved screen off the referral, screening in advance after sculping sculping the mixture into the coal dewatering screen sculping dehydrated medium sieve was split into the split box, after coal sculping on coal dewatering sieve material is discharged into the dewatering coal dewatering equipment, coal dewatering screen sculping sieve material qualified media and shunt tank together into the closed part of the media I referred tub;

所述的精煤脱介脱水筛筛下物的稀介质和分流箱中的另一部分介质II 一并进入粗煤泥分选入料桶;粗煤泥分选入料桶的煤介混合物进入分级旋流器中进行分级;经分级旋流器分级出的溢流细颗物料进入磁选机磁选,磁选机磁选后的精矿进入合介桶,磁选后的尾矿进入浮选设备浮选; Sculping said coal dewatering screen sieve material dilute media and streaming media box in another part II be entered into the barrel Slime Separation; Slime Separation medium mixture into the barrel of coal into the classification cyclone grading; graded - cyclone overflow fine particles out of the material into the concentrate magnetic separator, magnetic separator barrel after entering the co-mediator, after entering the flotation tailings magnetic separation flotation equipment;

经分级旋流器分级出的底流粗颗物料进入液固流化床粗煤泥分选机分选,液固流化床粗煤泥分选机分选出的溢流进入精煤磁选机磁选,磁选精矿进入合介桶,磁选尾矿经精煤煤泥分级脱水设备脱水,脱水后的精煤排出,精煤煤泥水进入浮选设备浮选; Graded - cyclone coarse particles out of the underflow material into the liquid-solid fluidized bed of coarse slime sorting machine sorting, liquid-solid fluidized bed of coarse slime separator sorted overflow into the coal separator magnetic separation, magnetic separation concentrate into the closed-mediated barrel, coal slime graded by magnetic separation tailings dewatering equipment dehydration, after the coal is discharged, coal slime water into the flotation device flotation;

液固流化床粗煤泥分选机分选出的底流进入中煤磁选机磁选,磁选精矿进入合介桶, 磁选尾矿经中煤煤泥分级脱水设备脱水,脱水后的中煤排出,中煤煤泥水进入浓缩压滤设备进行浓缩压滤。 After the liquid-solid fluidized bed of coarse slime separator underflow sorted coal into the magnetic separator, magnetic concentrate into the closed-mediated barrel, after magnetic separation tailings grade of coal slime dewatering equipment dehydration, The coal is discharged to the enrichment of coal slime water pressure filtration equipment concentrated pressure filtration.

[0006] 有益效果:将精煤脱介脱水筛筛下物的稀介质和分流箱中的部分介质一并进入粗煤泥分选入料桶,通过在液固流化床粗煤泥分选机的入料中引入重介系统中的介质,经液固流化床分选后,相应在液固流化床粗煤泥分选机的溢流和底流增加磁选回收介质,由于加入的重介质削弱粒度对干扰沉降的影响,强化物料按密度分选作用,减少了高密度细颗粒和低密度粗颗粒的错配,可提高液固流化床粗煤泥分选机在宽粒级范围内的分选精度, 在保证粗精煤灰分的前提下,大大提高了粗精煤的回收率。 [0006] The beneficial effects: the coal sculping dewatering screen sieve material dilute media and streaming media be part of the tank into the Slime Separation into the barrel through the liquid-solid fluidized bed Slime Separation HM system is introduced into the compound machine of the media, after the liquid-solid fluidized bed sorting, corresponding in liquid-solid fluidized bed of coarse slime sorting machine overflow and underflow increase recycling magnetic media, due to the addition of Dense Medium weaken the influence of particle size on the settlement of interference, and strengthen the role of material selected according to the density points, reducing the mismatch of high-density and low-density fine particles of coarse particles, can improve the liquid-solid fluidized bed of coarse slime sorting machine in a wide grain size sorting accuracy range, to ensure crude coal ash premise, greatly improving the recovery of coarse concentrate. 同时也延伸了液固流化床粗煤泥分选机的处理粒度范围,采用选前预脱泥时,可以增大脱泥筛的筛孔,提高脱泥效率和三产品重介旋流器的处理量,采用选前不脱泥时,可以增大脱介筛的筛缝,降低其介耗;液固流化床粗煤泥分选机对细颗粒的分选效果提高,可以降低浮选分选的有效分选粒度上限, 减少进入浮选的煤泥量,降低浮选成本。 While also extending the liquid-solid fluidized bed of coarse slime sorting machine processing size range, when using the pre-off the mud before the election, you can increase the mesh sieve off the mud, improve the efficiency of removal of mud and three product dense medium cyclone the amount of processing, using off the mud before the election is not possible to increase sculping the sieve seam, reducing the medium consumption; liquid-solid fluidized bed of coarse slime separator for fine particle separation efficiency increase, can reduce float choose sorting effective separation size limit, reducing the amount of slime into the flotation, flotation costs lower.

附图说明 Brief Description

[0007] 图1是本发明的工艺流程示意图。 [0007] FIG. 1 is a schematic process flow diagram of the present invention. 具体实施方式 DETAILED DESCRIPTION

[0008] 下面结合附图对本发明的实施例作进一步的描述: [0008] the following with reference to embodiments of the present invention will be further described:

实施一、当原煤中粒度小于0. 5mm、含量低于20%时,无需对原煤1进行脱泥,其分选工艺步骤如下: Implement one, when the raw coal particle size less than 0. 5mm, containing less than 20%, without the need for coal 1 is off the mud, the separation process as follows:

a.不脱泥的原煤和介质桶22中的介质一并进入三产品重介旋流器3中进行分选,分别选出精煤、中煤和矸石,分选出的中煤进入中煤脱介脱水设备4,分选的矸石进入矸石脱介脱水设备7 ; a. No Desliming medium bucket of coal and 22 media together into the three product dense medium cyclone 3, sorting, were elected coal, coal and waste rock, sorted the coal into the coal sculping dewatering device 4, sorting of waste rock into the gangue dewatering equipment sculping 7;

b.三产品重介旋流器3分选出的精煤进入精煤弧形筛5预先脱介,弧形筛5的筛上混合物进入精煤脱介脱水筛7脱介脱水,筛下物介质进入分流箱8中分流; b. three product dense medium cyclone 3 minutes into the selected coal coal curved screen 5 pre sculping, the arc of the mixture into the sieve 5 sculping coal dewatering screen 7 sculping dehydrated sieve material medium to shunt shunt box 8;

c.精煤脱介脱水筛7的筛上物精煤经精煤脱水设备9脱水排出,.精煤脱介脱水筛7 的筛下物合格介质和分流箱8下的一部分介质I进入合介桶22内,精煤脱介脱水筛7的筛下物合格介质和分流箱8下的另一部分介质II进入粗煤泥分选入料桶10内; c. coal sculping coal dewatering screen was on the screen 7 through 9 dewatering discharge coal dewatering equipment, dewatering coal sculping medium sieve sieve material portion 7 of 8 under qualified media and shunt into the closed box I referred 22 within the barrel, coal sculping sieve dehydration was 7 under qualified media and shunt tank under another section 8 medium Slime Separation II enters into drum 10;

d.粗煤泥分选入料桶10内的煤介混合物经过泵输送到分级旋流器11中进行分级; . d Slime Separation into the barrel 10 is a mixture of coal mediated through the pump to grade 11 to grade cyclone;

f.分级旋流器11分级溢流出的细颗粒进入磁选机15磁选,磁选出的精矿进入合介桶22,磁选出的尾矿进入浮选设备21浮选; . f grade cyclone overflow grade 11 fine particles into the magnetic separator 15, the magnetic concentrate elected referral barrel 22 into the closed magnetic elected flotation tailings into the flotation device 21;

g.分级旋流器11分级溢流出的细颗粒进入液固流化床粗煤泥分选机12分选以后,在干扰沉降作用下,低密度颗粒上升成为溢流,进入精煤磁选机14中磁选,精煤磁选机14的磁选精矿流回合介桶22内,磁选尾矿进入精煤煤泥分级脱水设备17脱水后排出精煤20,脱水后的精煤煤泥水进入浮选设备21中浮选; g. classifying cyclone overflow grade 11 fine particles into the liquid-solid fluidized bed of coarse slime separator 12 after separation, sedimentation interference, the low-density particulate rose to become the overflow into the coal separator After 14 magnetic separation, magnetic separator coal concentrate flow-mediated round tub 14 22, magnetic separation tailings entering grade coal slime dewatering discharge coal dewatering equipment 17 20 coal slime water after dehydration 21 into the flotation device flotation;

h.分级旋流器11分级底流中的细颗粒进入液固流化床粗煤泥分选机12分选以后, 在干扰沉降作用下,低密度颗粒沉降成为底流,进入中煤磁选机13中磁选,经中煤磁选机13磁选的尾矿流回到合介桶22,磁选尾矿进入中煤煤泥分级脱水设备16脱水后,排出中煤18,脱水后的中煤煤泥水进入浓缩压滤设备21中进行浓缩压滤。 h. After classifying cyclone to enter the liquid-solid fluidized bed of coarse slime separator 12 sorting grading bottom stream 11 of fine particles, sedimentation interference, the low-density particles settle become underflow into coal separator 13 In magnetic separation, the coal tailings magnetic separator 13 flows back together referred barrel 22, magnetic separation tailings into the grading of coal slime dewatering dewatering device 16, the discharge of coal 18, dewatered coal Slurry water into the concentrate filter press apparatus 21 to concentrate filter press.

[0009] 实施二、当原煤中粒度小于0. 5mm、含量大于20%时,需对原煤1进行脱泥。 [0009] The second, when the raw coal particle size less than 0. 5mm, content greater than 20%, the need for coal 1. Desliming. 先将原煤1引入脱泥筛2中进行脱泥,脱泥后的筛上物原煤进入三产重介旋流器3进行分选,脱泥后的筛下物煤泥水进入粗煤泥分选入料桶10内;后续的工艺与实施一相同,省略。 1 introduced the first coal mud off the screen in 2 de mud, coal was the sieve into the mud off three production HM cyclone 3 sorting, sieve material slime off the mud after the water into the Slime Separation the drum 10; a follow-up process and the implementation of the same is omitted.

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Classifications
International ClassificationB03B9/00, B03B7/00, B03C1/30, B03D1/00
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